Diesel Emissions Fluid Temperature Sensor: Description and Operation

GF14.40-D-3042HU Component Description For AdBlue Tank Temperature Sensor

- with CODE (MG5) Engine OM 642 DE 30 LA, 140 kW (190 hp) 3800 rpm
- with CODE (MH1) Low-emission engine EPA 10/CARB
- with CODE (ZU7) National version for Canada

- with CODE (MG5) Engine OM 642 DE 30 LA, 140 kW (190 hp) 3800 rpm
- with CODE (MH1) Low-emission engine EPA 10/CARB
- with CODE (ZU8) National version for USA





30 AdBlue(R) tank
32 AdBlue(R) extraction tank

B152 AdBlue(R) tank fill level sensor
R51b1 AdBlue(R) tank temperature sensor

Location

The AdBlue(R) tank temperature sensor is located together with the AdBlue(R) tank fill level sensor and the AdBlue(R) removal tank in the AdBlue(R) tank.

Task

The AdBlue(R) tank temperature sensor detects the temperature of the reducing agent AdBlue(R) in the AdBlue(R) tank.

Design

The AdBlue(R) tank temperature sensor has an integrated measuring resistor with negative temperature coefficient (NTC).

Function

The NTC measuring resistor changes its electrical resistance according to the temperature of the AdBlue(R) reducing agent. Electrical resistance decreases as temperature increases. The variation in resistance causes a voltage signal to be generated and this is used by the AdBlue(R) control unit (N141) to calculate the temperature of the reducing agent.